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Diodes Incorporated P4SMAJ13ADF-13
- Part No.:
- P4SMAJ13ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P4SMAJ13ADF-13.pdf
- Description:
- TVS DIODE 13VWM 21.5VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:9,929
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Product details
Overview
P4SMAJ13ADF-13 from Diodes Incorporated is a 400W surface-mount transient voltage suppressor (TVS) diode designed for unidirectional overvoltage protection in DC power lines and signal interfaces. It features a reverse standoff voltage of 13 V, clamping voltage of 21.5 V at 18.6 A peak pulse current, and IEC 61000-4-2 ESD rating of ±30 kV (air/contact). Used in industrial power supplies and automotive body electronics to safeguard microcontrollers and sensors against EFT and lightning-induced surges.
For engineers reviewing the P4SMAJ13ADF-13 datasheet, P4SMAJ13ADF-13 pinout, P4SMAJ13ADF-13 application, or P4SMAJ13ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under 10/1000 µs waveform, thermal resistance on FR-4 PCB, and D-FLAT package compatibility with high-density layouts.
Technical Context
This unidirectional TVS operates as a silicon avalanche diode with cathode-band polarity marking. Its breakdown voltage is specified at 14.4–15.9 V with 1.0 mA test current, ensuring reliable triggering above system operating voltage while avoiding false conduction during transients.
It delivers 400 W peak pulse power per 10 × 1000 µs waveform, with thermal resistance of 37 °C/W (junction-to-terminal) on standard FR-4 board layout. The device sustains operation from –55 °C to +150 °C and exhibits <1.0 µA reverse leakage at 13 V standoff, minimizing standby power loss in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - Sustains single 10/1000 µs surge without failure in typical board thermal conditions |
| Reverse Standoff Voltage (VRWM) | 13 V - Maximum continuous DC voltage before significant leakage; sets upper limit for protected circuit rail |
| Clamping Voltage (VC) | 21.5 V @ 18.6 A - Limits transient voltage seen by downstream ICs during surge events |
| Breakdown Voltage (VBR) | 14.4–15.9 V @ 1.0 mA - Confirmed avalanche onset range; ensures robust margin over VRWM |
| ESD Rating | ±30 kV air / ±30 kV contact - Meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
| Junction-to-Terminal RθJT | 37 °C/W - Enables 1.0 W steady-state dissipation at TL = +75 °C with minimal board copper |
| Capacitance | Typ. 100 pF @ 0 V, 1 MHz - Low enough for USB 2.0 and RS-485 data line protection without signal integrity impact |
Pinout & Package
Package: D-FLAT (low-profile surface-mount), molded plastic case with UL 94V-0 flammability rating, matte tin–annealed copper leadframe, cathode band polarity indicator, weight ≈ 0.035 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Anode-side connection point for reverse-biased TVS operation | Connected to protected line (e.g., VIN); conducts when line voltage exceeds VRWM + VBR |
| 2 (Anode) | Reference/ground return path | Connected to system ground plane; completes clamping path during transient events |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures stable breakdown characteristics and long-term reliability under repeated surge stress |
| Low-profile D-FLAT package | Reduces board space by >40% vs. SMA; enables placement near connectors and IC power pins |
| Lead-free, halogen-free, RoHS 3 compliant | Meets IPC-J-STD-020 moisture sensitivity Level 1 and global environmental compliance mandates |
| High ESD immunity | ±30 kV air/contact withstand eliminates need for additional ESD protection stages in many designs |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input rail in programmable logic controllers exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role: Unidirectional TVS placed between input connector and DC-DC converter input capacitor. Use Value: Clamps 10/1000 µs surges to ≤21.5 V, preventing damage to 36 V-rated input MOSFETs and enabling compliance with IEC 61000-4-5 Level 3. | Use Scenario: LIN bus transceiver power supply line in door module subjected to ESD and cable discharge events. IC Role / Device Role: Primary overvoltage clamp on VCC rail upstream of transceiver IC. Use Value: Withstands ±30 kV contact ESD per IEC 61000-4-2 while adding <100 pF capacitance-no signal distortion on 20 kbps LIN signals. |
| USB Host Port ESD Protection | Smart Meter Communication Interface |
Use Scenario: VBUS line of USB 2.0 host port in industrial HMI requiring CE-marked ESD immunity. IC Role / Device Role: Secondary clamping device after common-mode choke, protecting USB controller PHY. Use Value: Limits VBUS overshoot to 21.5 V during ±15 kV ESD event, preserving 5.5 V tolerant USB PHY operation without latch-up. | Use Scenario: RS-485 transceiver power rail in utility smart meter exposed to induced surges on long outdoor wiring. IC Role / Device Role: Rail clamp on 3.3 V or 5 V supply feeding isolated RS-485 driver/receiver. Use Value: Delivers 18.6 A peak pulse current handling with 21.5 V clamping, maintaining transceiver functionality during 1 kV/500 A surge tests per ANSI C12.1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13A | Same 13 V VRWM and 21.5 V VC, but SMB package (larger footprint, higher RθJA = 125 °C/W) | Less suitable for ultra-dense layouts; requires larger thermal pad for same power derating | Select when board space allows and higher steady-state power margin is needed |
| 1.5SMC13A | Same electrical specs but SMC package (5.3 mm × 4.5 mm vs. D-FLAT's 4.6 mm × 2.8 mm); 1.5 kW rating over 10/1000 µs | Over-specified for 400 W use cases; adds cost and volume where not required | Prefer only if legacy SMC footprint reuse or future-proofing for higher surge levels is mandatory |
Compared with SMBJ13A and 1.5SMC13A, P4SMAJ13ADF-13 offers optimal balance of compact D-FLAT footprint, 37 °C/W junction-to-terminal thermal resistance, and precise 400 W surge rating-making it ideal for space-constrained industrial and automotive modules where thermal performance and board area are critical.
Availability
P4SMAJ13ADF-13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, USB interface protection, and smart meter communication interfaces requiring stable component supply and full RoHS 3 compliance.
Supply support for P4SMAJ13ADF-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The P4SMAJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for high-reliability DC rail protection in harsh environments-including automotive, industrial automation, and energy metering-where low clamping voltage, fast response, and long-term stability under repeated surges are essential.
FAQ
What is the maximum allowable ambient temperature for continuous operation?
The P4SMAJ13ADF-13 operates from –55 °C to +150 °C junction temperature. At ambient temperatures up to +75 °C with proper PCB copper area, its 1.0 W steady-state power dissipation is maintained. Derating begins above +25 °C per Figure 1; at +85 °C ambient, maximum continuous power drops to ~0.6 W due to thermal resistance limits.
Does this TVS require a heatsink for 400 W pulse handling?
No external heatsink is required for single 10/1000 µs pulses. The 400 W rating assumes standard FR-4 PCB mounting per JEDEC standards (0.06″ × 0.09″ copper pad, 2 oz copper). Thermal mass of the PCB itself provides sufficient transient heat sinking; sustained repetitive pulses require verification of average power and board temperature rise.
Can P4SMAJ13ADF-13 be used in bidirectional configurations?
No-it is a unidirectional TVS diode with cathode-band polarity. For bidirectional protection (e.g., AC lines or differential data buses), a dedicated bidirectional part such as P4SMAJ13CA or a back-to-back diode configuration is required. Using this part in reverse bias beyond its rated standoff will cause permanent breakdown.
How does its capacitance affect high-speed signal lines?
With typical capacitance of 100 pF at 0 V bias and 1 MHz, P4SMAJ13ADF-13 is suitable for USB 2.0 (480 Mbps), RS-485, CAN, and LIN bus protection. It introduces negligible insertion loss below 100 MHz but is not recommended for USB 3.0 (>5 Gbps) or PCIe Gen3+ due to bandwidth limitations imposed by parasitic capacitance.
P4SMAJ13ADF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 2-SMD, Flat Leads
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D-Flat
P4SMAJ13ADF-13 FAQ
1.How can I place an order for P4SMAJ13ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMAJ13ADF-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for P4SMAJ13ADF-13 reliable?
The price and inventory of P4SMAJ13ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMAJ13ADF-13 is usually 5 days.
3.What payment methods are accepted for P4SMAJ13ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMAJ13ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMAJ13ADF-13?
P4SMAJ13ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMAJ13ADF-13 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for P4SMAJ13ADF-13?
For technical support, including P4SMAJ13ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMAJ13ADF-13 requirements.
6.How does Aetrix verify that P4SMAJ13ADF-13 is sourced from the original manufacturer or authorized distributors?
All P4SMAJ13ADF-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that P4SMAJ13ADF-13 meets industry standards.
7.What is the process for return or replacement of P4SMAJ13ADF-13?
All P4SMAJ13ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMAJ13ADF-13, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The P4SMAJ13ADF-13 part is unused and in its original packaging.
Return procedure for P4SMAJ13ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMAJ13ADF-13 Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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